package com.example.week12_networkprogramming;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.List;
import java.util.Map;

/**
 * Created by HP on 2022/5/16.
 */

public class GetPostUtil {
    public static String sendGet(String url,String params){
        String result="";
        BufferedReader in = null;
        try{
            String urlName = url+"?"+params;
            URL realUrl = new URL(urlName);
            URLConnection conn = realUrl.openConnection();
            conn.setRequestProperty("accept","*/*");
            conn.setRequestProperty("connection","Keep-Alive");
            conn.setRequestProperty("user-agent","Mozilla/4.0(compatible;MSIE 6.0;Windows NT 5.1;SV1)");
            conn.connect();
            Map<String,List<String>> map=conn.getHeaderFields();
            for(String key:map.keySet()){
                System.out.println(key+"-->"+map.get(key));
            }
            in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
            String line;
            while((line=in.readLine())!=null){
                result+="\n"+line;
            }
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            try{
                if(in!=null){
                    in.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return result;
    }

    public static String sendPost(String url,String params){
        PrintWriter out = null;
        BufferedReader in = null;
        String result="";
        try{
            URL realUrl = new URL(url);
            URLConnection conn = realUrl.openConnection();
            conn.setRequestProperty("accept","*/*");
            conn.setRequestProperty("connection","Keep-Alive");
            conn.setRequestProperty("user-agent","Mozilla/4.0(compatible;MSIE 6.0;Windows NT5.1;SV1)");
            conn.setDoOutput(true);
            conn.setDoInput(true);
            out=new PrintWriter(conn.getOutputStream());
            out.print(params);
            out.flush();
            in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
            String line;
            while((line=in.readLine())!=null){
                result+="\n"+line;
            }
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            try{
                if(out!=null){
                    out.close();
                }
                if(in!=null){
                    in.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return result;
    }
}
